121200121122220 has 48 divisors (see below), whose sum is σ = 290881048546368. Its totient is φ = 41554218977280.

The previous prime is 121200121122191. The next prime is 121200121122233. The reversal of 121200121122220 is 22221121002121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67784824 + ... + 69549856.

It is an arithmetic number, because the mean of its divisors is an integer number (6060021844716).

Almost surely, 2^{121200121122220} is an apocalyptic number.

121200121122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200121122220 is an abundant number, since it is smaller than the sum of its proper divisors (169680927424148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121200121122220 is a wasteful number, since it uses less digits than its factorization.

121200121122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255530 (or 2255528 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121200121122220 its reverse (22221121002121), we get a palindrome (143421242124341).

The spelling of 121200121122220 in words is "one hundred twenty-one trillion, two hundred billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty".